可以兼容Masonry自动约束。
1.添加通知
//设置两个通知
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyHiden:) name: UIKeyboardWillHideNotification object:nil];
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyWillAppear:) name:UIKeyboardWillChangeFrameNotification object:nil];
2.实现监听
#pragma mark-键盘出现隐藏事件
-(void)keyHiden:(NSNotification *)notification
{
[UIView animateWithDuration:0.25 animations:^{
//恢复原样
_textView.transform = CGAffineTransformIdentity;
}];
}
-(void)keyWillAppear:(NSNotification *)notification
{
//获得通知中的info字典
NSDictionary *userInfo = [notification userInfo];
CGRect rect= [[userInfo objectForKey:@"UIKeyboardFrameEndUserInfoKey"]CGRectValue];
[UIView animateWithDuration:0.25 animations:^{
_textView.transform = CGAffineTransformMakeTranslation(0, -([UIScreen mainScreen].bounds.size.height-rect.origin.y));
}];
}
3.在合适的地方移除监听
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
